Patti Smith's version of "Gimme Shelter" is a possibility for a "Songs of PTSD" CD. (Probably she has at least one other such, but I seem to be blanking on it. "Dancing Barefoot" may count since I think it's about her near-fatal fall in 1977, especially given the way she sings it on an extraordinary bootleg recorded with Nick Tosches, but perhaps this is too hypothetical.)

There's also a version of the Doors' "Crystal Ship" that she sings, that has that vibe for me. It's on YouTube.

http://www.youtube.com/watch?v=fqmCx9nUyII